| 0,0 → 1,84 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef __CONTEXT_H__ |
| #define __CONTEXT_H__ |
| |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <arch/context.h> |
| |
| |
| #ifndef context_set |
| #define context_set(c, _pc, stack, size) \ |
| (c)->pc = (__address) (_pc); \ |
| (c)->sp = ((__address) (stack)) + (size) - SP_DELTA; |
| #endif /* context_set */ |
| |
| extern int context_save_arch(context_t *c); |
| extern void context_restore_arch(context_t *c) __attribute__ ((noreturn)); |
| |
| /** Save register context. |
| * |
| * Save current register context (including stack pointers) |
| * to context structure. |
| * |
| * Note that call to context_restore() will return at the same |
| * address as the corresponding call to context_save(). |
| * |
| * @param c Context structure. |
| * |
| * @return context_save() returns 1, context_restore() returns 0. |
| */ |
| static inline int context_save(context_t *c) |
| { |
| return context_save_arch(c); |
| } |
| |
| /** Restore register context. |
| * |
| * Restore previously saved register context (including stack pointers) |
| * from context structure. |
| * |
| * Note that this function does not normally return. |
| * Instead, it returns at the same address as the |
| * corresponding call to context_save(), the only |
| * difference being return value. |
| * |
| * Note that content of any local variable defined by |
| * the caller of context_save() is undefined after |
| * context_restore(). |
| * |
| * @param c Context structure. |
| */ |
| static inline void context_restore(context_t *c) |
| { |
| context_restore_arch(c); |
| } |
| |
| #endif |